PAC1941T-1ESLASH4MX. datasheet(17/96 Pages) MICROCHIP

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DS20006543A-page 17

PAC194X

3.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 3-1 and

Table 3-2.

TABLE 3-1:

PAC194X-1 PIN FUNCTION TABLE

VQFN

WLCSP

Symbol

Pin Type

Description

SLOW/ALERT1

Digital I/O Pin

Default: SLOW Input pin. When high, all channels

sample at 8 SPS. The pin may be programmed to

function as the ALERT1 pin or GPIO (open-drain).

2A4

VDD

Power for IC

Positive power supply voltage.

GND

Ground Pin

Ground for the IC.

SCL

SMBus Clock

Input

Clock Input pin.

SDA

SMBus Data I/O

Open-drain requires a pull-up resistor to Host VDD.

ADDRSEL

Analog I/O Pin

Address selection for the SMBus client address.

7C1(2)

SENSE3-(1)

Analog Input Pin

0-FSR, connect to the load side of the sense resistor.

8D1(2)

SENSE3+(1)

Analog Input Pin

0-FSR, connect to the supply side of the sense

resistor.

9D2(2)

SENSE4-(1)

Analog Input Pin

0-FSR, connect to the load side of the sense resistor.

D3(2)

SENSE4+(1)

Analog Input Pin

0-FSR, connect to the supply side of the sense

resistor.

SENSE1+

Analog Input Pin

0-FSR, connect to the supply side of the sense

resistor.

SENSE1-

Analog Input Pin

0-FSR, connect to the load side of the sense resistor.

A1(2)

SENSE2+(1)

Analog Input Pin

0-FSR, connect to the supply side of the sense

resistor.

B1(2)

SENSE2-(1)

Analog Input Pin

0-FSR, connect to the load side of the sense resistor.

GPIO/ALERT2

Digital I/O Pin

Default: GPIO, Input mode. May be programmed to

be the ALERT2 pin indicator (open-drain) or GPIO

(open-drain).

PWRDN

Digital Input Pin

Active-low puts the device in a Power-Down state (all

circuitry is powered down, including SMBus).

—

N/C

The Exposed Pad is not electrically connected.

Note 1: VQFN Package: for PAC1941-1, pins 7, 8, 9, 10, 13 and 14 are not connected inside and must be

grounded. For PAC1942-1, pins 7, 8, 9 and 10 are not connected inside and must be grounded. For

PAC1943-1, pins 9 and 10 are not connected inside and must be grounded.

2: WLCSP Package: for PAC1941-1, pins A1, B1, C1, D1, D2 and D3 are inactive and must be grounded.

For PAC1942-1, pins C1,D1, D2, D3 are inactive and must be grounded. For PAC1943-1, pins D2 and D3

are inactive and must be grounded.

3: Analog Input pins: for any unused channels, connect the SENSE+ and SENSE- pins to ground. Voltage

may be applied to the analog input pins before or after VDD is applied to the device.

4: For the analog input pins, the safe operating voltage range is up to 9V.

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